Abstract
The oxygen content after deoxidation by the addition of 0.5% Al or 0.5% Si in molten iron was studied using various oxide crucibles.
The results obtained are as follows:
1) Deoxidation proceeded not only by the flotation of oxide inclusions (deoxidation products) but also by the reaction of oxide inclusions with crucible material at the metal-crucible interface.
2) The oxygen content decreased with increase of the difference of iron-oxygen attraction force (I=Z/a2) between oxide crucible and deoxidation product.
3) X. M. A. line analysis of crucible wallmatter, Al-deoxidation indicated that deoxidation product alumina penetrated remarkably into the crucible wall in the case of CaO crucible, whereas it enriched only at the crucible surface in the case of SiO2 crucible.
